Topic
Acoustic interferometer
About: Acoustic interferometer is a research topic. Over the lifetime, 1493 publications have been published within this topic receiving 19355 citations.
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TL;DR: In this paper, it was shown that monochromatic radiation (λ 1 = 5888 A, λ 2 = 5882 A, and λ 3 = 4876 A) can be obtained in a gas-discharge plasma in argon with the use of acoustic waves.
Abstract: It is shown that monochromatic radiation (λ1=5888 A, λ2=5882 A, and λ3=4876 A) can be obtained in a gas-discharge plasma in argon with the use of acoustic waves.
3 citations
01 Sep 2004
TL;DR: In this paper, standing waves with maximum pressures of 188 kPa have been produced in resonators containing ambient pressure air, and the feasibility of reducing leakage using non-linear acoustics has been confirmed.
Abstract: 1) Standing waves with maximum pressures of 188 kPa have been produced in resonators containing ambient pressure air; 2) Addition of structures inside the resonator shifts the fundamental frequency and decreases the amplitude of the generated pressure waves; 3) Addition of holes to the resonator does reduce the magnitude of the acoustic waves produced, but their addition does not prohibit the generation of large magnitude non-linear standing waves; 4) The feasibility of reducing leakage using non-linear acoustics has been confirmed.
3 citations
01 Jan 1973
3 citations
TL;DR: In this article, a new procedure to determine the compressional acoustic impedance of liquids within ±0.05% resolution and ± 0.25% accuracy is presented. This method is based on the measurement of the bandwidth of a piezoelectric transducer, vibrating in thicknessexpansion mode and having a high quality factor (e.g., air-backed X-cut quartz crystal), in direct contact with the sample.
Abstract: A new procedure to determine the compressional acoustic impedance of liquids within ±0.05% resolution and ±0.25% accuracy is presented. This method is based on the measurement of the bandwidth of a piezoelectric transducer, vibrating in thickness-expansion mode and having a high quality factor (e.g., air-backed X-cut quartz crystal), in direct contact with the sample. In combination with other ultrasonic techniques (pulse-echo or through-transmission), it is possible to simultaneously obtain the main ultrasonic parameters (characteristic acoustic impedance, speed of sound and attenuation coefficient), and deduce important physicochemical properties of liquids, such as density and adiabatic compressibility. Experimental results for selected liquids and solutions are shown.
3 citations
01 Sep 2009
TL;DR: In this paper, the authors investigate uniform fluid and mixing flows with linear speeds up to 1-10 mm/s, actuated by surface acoustic waves and develop a numerical model of the system that accounts for the acoustic streaming in the fluid with treatment of viscous and solid-fluid coupling effects.
Abstract: We investigate uniform fluid and mixing flows with linear speeds up to 1–10 mm/s, actuated by surface acoustic waves Under strong acoustic excitation, transition from uniform to oscillatory mixing flow occurs when the width of the channel increases beyond one acoustic wavelength of sound in the fluid λ f In this high velocity regime, particles of one micrometer in diameter suspended in aqueous solution are observed to follow the streamlines Under weak acoustic excitation, particles aligning into equally-spaced lines (with a separation of λ f /2) due to the presence of acoustic standing waves across the channel and move slowly in the reverse direction due to the slow streaming We developed a numerical model of the system that accounts for the acoustic streaming in the fluid with treatment of viscous and solid-fluid coupling effects, and the results qualitatively support the observed phenomena in the experiments
3 citations